PDF malware analysis — malicious · be6a3e5dd074c9e1

MALICIOUS

PDF

12.5 KB

MD5: b389c14a82db170a42b5bc62772137dc SHA-1: 621bc1df43fe9d5a53108b7d0cd4ada33c3aedad SHA-256: be6a3e5dd074c9e16ef2ba2b66de8b15fdc229c3b27355d65de77a0076302beb

106 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: User Execution: Malicious File

The PDF contains embedded JavaScript, which is a common technique for exploiting vulnerabilities in PDF readers. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download and execute a secondary payload. The primary IOC is the file hash itself, as no further network indicators were extracted.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 3

ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `ed55df3130c5d91eb8fafebcc6fc3153a1b3ffbb88b40f348ea0e483517b21d6`	pdf-javascript-stream	PDF /JS object 76 at offset 0x369	11656 bytes
Detection ClamAV: Pdf.Exploit.Pdfka-9 Obfuscation or payload: unlikely

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